Package: gcc-6 Version: 6-20151211-1 Severity: normal Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate *** * What led up to the situation? Attempting to build mplayer source from: svn checkout svn://svn.mplayerhq.hu/mplayer/trunk mplayer with ./configure --cc=gcc-6 --host-cc=gcc-6 CC libavcodec/pngdec.o libavcodec/pngdec.c: In function 'decode_frame_common.isra.7': libavcodec/pngdec.c:1021:43: warning: 'background_alpha' may be used uninitialized in this function [-Wmaybe-uninitialized] uint8_t foreground_alpha, background_alpha, output_alpha; ^~~~~~~~~~~~~~~~ libavcodec/pngdec.c:1060:30: warning: 'foreground_alpha' may be used uninitialized in this function [-Wmaybe-uninitialized] libavcodec/pngdec.c:1086:12: internal compiler error: in contains_point, at diagnostic-show-locus.c:340 static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, ^~~~~~~~~~~~~~~~~~~ 0x102bf6f contains_point ../../src/gcc/diagnostic-show-locus.c:340 0x102bf6f get_state_at_point ../../src/gcc/diagnostic-show-locus.c:684 0x102c518 print_source_line ../../src/gcc/diagnostic-show-locus.c:538 0x102c518 diagnostic_show_locus(diagnostic_context*, diagnostic_info const*) ../../src/gcc/diagnostic-show-locus.c:803 0x63e6d0 c_diagnostic_finalizer ../../src/gcc/c-family/c-opts.c:167 0x102a248 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*) ../../src/gcc/diagnostic.c:800 0x102b2f0 warning_at(unsigned int, int, char const*, ...) ../../src/gcc/diagnostic.c:1029 0xb3cfd1 warn_uninit ../../src/gcc/tree-ssa-uninit.c:157 0xb42446 warn_uninitialized_phi ../../src/gcc/tree-ssa-uninit.c:2366 0xb42446 execute ../../src/gcc/tree-ssa-uninit.c:2459 * What exactly did you do (or not do) that was effective (or ineffective)? If building ffmpeg only, pngdec.c would compile fine. If using gcc-5, pngdec.c would compile fine. Attempted to obtain later snapshot of gcc-6 from Debian mirrors but it was unavailable. * What was the outcome of this action? * What outcome did you expect instead? *** End of the template - remove these template lines *** -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable') Architecture: amd64 (x86_64) Kernel: Linux 4.4.0-rc5+ (SMP w/4 CPU cores; PREEMPT) Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Init: sysvinit (via /sbin/init) Versions of packages gcc-6 depends on: ii binutils 2.25.90.20151209-1 ii cpp-6 6-20151211-1 ii gcc-6-base 6-20151211-1 ii libc6 2.21-4 ii libcc1-0 6-20151211-1 ii libgcc-6-dev 6-20151211-1 ii libgcc1 1:6-20151211-1 ii libgmp10 2:6.1.0+dfsg-2 ii libisl15 0.15-3 ii libmpc3 1.0.3-1 ii libmpfr4 3.1.3-2 ii libstdc++6 5.3.1-4 ii zlib1g 1:1.2.8.dfsg-2+b1 Versions of packages gcc-6 recommends: ii libc6-dev 2.21-4 Versions of packages gcc-6 suggests: pn gcc-6-doc <none> pn gcc-6-locales <none> pn gcc-6-multilib <none> pn libasan3-dbg <none> pn libatomic1-dbg <none> pn libcilkrts5-dbg <none> ii libgcc1-dbg 1:6-20151211-1 pn libgomp1-dbg <none> pn libitm1-dbg <none> pn liblsan0-dbg <none> pn libmpx0-dbg <none> pn libquadmath0-dbg <none> pn libtsan0-dbg <none> pn libubsan0-dbg <none> -- no debconf information -- debsums errors found: prelink: /usr/lib/gcc/x86_64-linux-gnu/6/lto1: prelinked file was modified debsums: changed file /usr/lib/gcc/x86_64-linux-gnu/6/lto1 (from gcc-6 package)